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It's good practice to measure slope angles

Toby Weed
Forecaster
It's good practice to measure slope angles when traveling in the backcountry.  Get an inclinometer or at least an app with one, and you'll get better at estimating slope angles with lots of practice.  I still prove my own estimates wrong after years of measuring slopes.
When traveling in the backcountry, if you stay off of and well out from under slopes steeper than 30°and away from connected adjacent slopes you will not be in danger from avalanches.